Optical sensor for sensing displacement speed or displacement of

Details Optical sensor for sensing displacement speed or displacement of Optical sensor for sensing displacement speed or displacement of

1986-11-06

1988-04-12

Witkowski, Stanley J.

Music

Instruments

84 11, 84DIG7, 250227, G10H 134

Patent

active

047366621

ABSTRACT:
In an optical sensor for displacement speed/displacement of a movable element in a musical instrument, light emitted from a light-emitting element is guided to a sensor head through a transmission optical fiber and is further guided to a light-receiving element through a reception optical fiber. The sensor head is located at a position corresponding to a shutter movable in accordance with the movable element in the musical instrument. The shutter controls photocoupling and nonphotocoupling between the transmission and reception optical fibers. The sensor is of transmission or reflection type.

REFERENCES:
patent: 4321463 (1982-03-01), Stecher
patent: 4362934 (1982-12-01), McLey
patent: 4429607 (1984-02-01), Meno
patent: 4442750 (1984-04-01), Bowley
patent: 4468999 (1984-09-01), Bonanno

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